html {
    height: 100%;
}

body {
    display: table;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

.error-container {
    display: table-cell;
    vertical-align: middle;
    text-align: center;
}

.error-code {
    display: block;
    font-size: 4em;
}

.error-message {
    display: block;
}
